Strategies for enhancing the initial coulombic efficiency of Si-based anodes in lithium-ion batteries☆

초록

Si-based anodes are considered a pivotal material for next-generation high-energy-density lithium-ion batteries (LIBs) due to their significantly higher theoretical specific capacity compared to conventional carbon-based anodes. However, the low initial coulombic efficiency (ICE) of Si-based anodes leads to continuous lithium consumption, triggering severe cascading reactions and significantly compromising cycling stability, thereby hindering their practical implementation. To promote the development of Si-based anodes, researchers have extensively investigated the underlying the mechanisms of low ICE and proposed effective strategies to mitigate this issue. This review synthesizes the recent research progress, elucidates the fundamental causes of low ICE in Si-based anodes, and systematically summarizes various strategies to enhance ICE. It provides valuable insights for the rational design and preparation for high ICE Si-based anodes and lays a foundation for their industrial application as next-generation high-electron/ion-throughput LIBs anodes.

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